The 19th Century: Scientific Discovery and Public Health Measures

Identification of the Leprosy Bacillus


A landmark event in the history of leprosy treatment occurred in 1873, when Gerhard Armauer Hansen, a Norwegian physician, identified Mycobacterium leprae as the causative agent of leprosy. This discovery was pivotal because it established leprosy as an infectious bacterial disease rather than a hereditary or divine curse.

  • This identification allowed physicians to better understand transmission and led to improved public health policies.


  • However, effective treatment remained elusive for several decades.



Public Health and Quarantine


Following Hansen’s discovery, many countries intensified efforts to isolate leprosy patients.

  • Leper Colonies Expanded: Isolation became official policy in many places, including Hawaii’s Kalaupapa settlement and colonies in Europe and Asia.


  • Stigma and Human Rights: These policies often resulted in severe human rights abuses, with patients forcibly removed from families and communities.



Experimental Treatments


In the 19th century, a variety of treatments were tried, mostly with limited success:

  • Arsenic and Mercury Compounds: These continued to be used despite toxicity.


  • Electricity and Hydrotherapy: Some physicians experimented with electricity and baths as attempts to stimulate healing.


  • Surgical Debridement: Removal of ulcers and infected tissue was common to reduce symptoms. shutdown123

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